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NOTE: The steps in this article do NOT apply to Microsoft Windows Millennium Edition (Me) and should not be performed on a Windows Me computer.

SUMMARY
This article describes how to remove and reinstall Dial-Up Networking and Transport Control Protocol/Internet Protocol (TCP/IP). These steps may be necessary under the following conditions:

? You are unable to connect to a remote computer, remote network, or the Internet using TCP/IP bound to a dial-up adapter.
? You have verified the accuracy of your TCP/IP settings.
? You have verified your modem is functioning correctly.

MORE INFORMATION
To remove and reinstall Dial-Up Networking and TCP/IP, use the following steps:

NOTE: You should have your original Windows CD-ROM or disks available before beginning these steps. Also, if the Rna.inf file is not re-extracted correctly, the option to reinstall DUN is not available in Windows Setup. Because of this, you must re-extract the Rna.inf file to the INF folder.

1. Record the configuration information for each connection in the Dial-Up Networking folder. To do so, use the following steps:a. Double-click My Computer, and then double-click Dial-Up Networking.
b. Right-click a connection, click Properties, and then record all of the settings including the TCP/IP information. Repeat this process with another connection until you have recorded all of your connection&#39;s configuration information.

2. If the Dial-Up Networking 1.2 or 1.3 Update is installed, uninstall it. If it is not installed, continue to the next step. To uninstall the Dial-Up Networking 1.2 or 1.3 Update, use the following steps:a. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
b. On the Install/Uninstall tab, click Dial-Up Networking Upgrade 1.2 (or 1.3), and then click Add/Remove.
c. When you are prompted to remove the update, click Yes, and then click OK.

3. Delete all of your connections from the Dial-Up Networking folder. To do so, right-click a connection, and then click Delete. Repeat this process with another connection until you have deleted all of your connections, and then close the Dial-Up Networking folder.

4. In Network properties, record each component and its configuration information:a. Click Start, point to Settings, click Control Panel, and then double-click Network.
b. Click a component on the Configuration tab, click Properties, and then record all of the component&#39;s settings. Repeat this process with another component until you have recorded all of your component&#39;s configuration information.
NOTE: Make sure that you have the required disks to reinstall any third-party items before you remove them in Network properties.

5. Remove all of the network components from Network properties. To do so, click a component on the Configuration tab, and then click Remove. Repeat this process until you have deleted all of the network components from Network properties, click OK, and then click Yes when you are prompted to restart your computer.

6. Uninstall Dial-Up Networking. To do so, follow these steps:a. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
b. Click the Windows Setup tab, click Communications (the word Communications, not the checkbox), click Details, and then click the Dial-Up Networking check box to clear it.
c. Click OK, click Apply, click OK, and then click Yes when you are prompted to restart your computer.

Standard cab files in Windows 95 are in the Win95_10.cab file. In Windows 95 OSR2 the location is the Win95_16.cab file. In Windows 98 the location is the Win98_37.cab file, and in Windows 98 Second Edition it is the Win98_40.cab file. Note that these files are in the actual .cab files of the operating system as opposed to the precopy .cab files.

10. Restart your computer.

11. Reinstall Dial-Up Networking. To do so, use the following steps:a. Click Start, point to Settings, click Control Panel, and then double-click Add/Remove Programs.
b. On the Windows Setup tab, click Communications (the word Communications, not the check box), click Details, and then click to select the Dial-Up Networking check box.
c. Click OK, click Apply, click OK, and then click Yes when you are prompted to restart your computer.NOTE: You may receive version conflict error messages during this process. If this happens, click Yes when you are prompted to keep a newer version of the Secur32.dll and Rpc*.dll files. Click No for all other files.

12. Reinstall and configure the network components (listed in step 5). To do so, use the following steps:a. If you have a network adapter installed, install the software for the adapter according to the manufacturer&#39;s instructions.
b. Click Start, point to Settings, click Control Panel, and then double-click Network.
c. On the Configuration tab, click Add, click Adapter, click Add, click Microsoft in the Manufacturers box, click Dial-Up Adapter, and then click OK.
d. Click Protocol, click Add, click Microsoft in the Manufacturers box, click TCP/IP, and then click OK.NOTE: You may receive version conflict error messages during this process. If this happens, click No when you are prompted to keep a newer version of each file.
e. : You may receive version conflict error messages during this process. If this happens, click No when you are prompted to keep a newer version of each file.If needed, add a network client. To do so, click Client, click Add, click the appropriate manufacturer, click the client you want to install, and then click OK.NOTE: You may need to reconfigure the network components that have been reinstalled. To do so, click the network component, click Properties, add any appropriate settings, and then click OK. If needed, refer to the configuration information you recorded in step 4.

13. Restart your computer.

14. Re-create your Dial-Up Networking connections. To do so, use the following steps:a. Double-click My Computer, double-click Dial-Up Networking, and then follow the instructions on the screen in the Make New Connection Wizard.
b. Right-click the connection that you created, click Properties, and then verify that the settings are the same as the configuration information you recorded in step 2. Repeat steps a and b until you have re-created all of your Dial-Up Networking connections.

NOTE: If after you perform the steps listed in this article you receive the following error message:

Refer to the following article in the Microsoft Knowledge Base to resolve the issue:

174579 Error Message: Error 745: An Essential File Is Missing

NOTE: The Arabic and Hebrew localized versions of the Dial-Up Networking 1.3 update cannot be uninstalled from Windows 95. For additional information about how to determine which folder Windows is installed in, click the article number below to view the article in the Microsoft Knowledge Base: